CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Income Statement [Abstract]
Net sales	$ 3,459,264	$ 1,681,735	$ 8,724,412	$ 5,843,653
Cost of products sold	2,953,984	1,476,102	7,425,403	5,072,803
Gross profit	505,280	205,633	1,299,009	770,850
Selling, general and administrative expenses	231,834	128,147	619,786	478,968
Amortization of intangible assets	30,480	24,079	87,110	72,645
Impairment charges	0	0	0	10,057
Interest income	142	847	662	2,796
Interest expense	26,808	26,868	75,248	82,127
Other income (expense), net	16,379	(6,157)	25,430	(5,123)
Income before income taxes	232,679	21,229	542,957	124,726
Income tax provision (benefit)	49,960	(1,555)	113,409	23,071
Net income	182,719	22,784	429,548	101,655
Less: Net (loss) attributable to non-controlling interests	(592)	(1,284)	(44)	(2,151)
Net income attributable to THOR Industries, Inc.	$ 183,311	$ 24,068	$ 429,592	$ 103,806
Weighted-average common shares outstanding:
Basic (in shares)	55,366,241	55,198,756	55,323,080	55,163,943
Diluted (in shares)	55,723,378	55,392,982	55,615,107	55,337,665
Earnings per common share:
Basic (in dollars per share)	$ 3.31	$ 0.44	$ 7.77	$ 1.88
Diluted (in dollars per share)	$ 3.29	$ 0.43	$ 7.72	$ 1.88
Comprehensive income (loss):
Net income	$ 182,719	$ 22,784	$ 429,548	$ 101,655
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment	(7,449)	(25,245)	33,691	(36,154)
Unrealized gain (loss) on derivatives, net of tax	2,929	(7,763)	8,612	(11,709)
Total other comprehensive income (loss), net of tax	(4,520)	(33,008)	42,303	(47,863)
Total Comprehensive income (loss)	178,199	(10,224)	471,851	53,792
Less: Comprehensive income (loss) attributable to non-controlling interests	(647)	(1,483)	41	(2,794)
Comprehensive income (loss) attributable to THOR Industries, Inc.	$ 178,846	$ (8,741)	$ 471,810	$ 56,586